I haven't been able to locate that post - but I've actually fought the battle with rockwool, used to SureToGrow, went straight into balls, even tried hybrid silicate compounds...and then I began picking the brain of the operator of my favorite co-op (favorite because he grows beautiful plants with wonderful medicine, time and again); he is actually the one that turned me on to what I'm doing now, and I have to say, rockwool gets a bad rap. I now use 2x4 cubes, the 2" in depth, and the 4" in width - these babies are surrounded by a ton of clay balls (I'm in 10" pots, not 6") which are just simply better than SureToGrow and silicate products, for ease, for re-use, for water and oxygen retention - I love my balls (hehe). Anyway, onward - my biggest fear in switching to this grower's method was the potential for overwatering - he said, don't trust me, trust results - so I tried it, and I'm never going back. My last grow was problematic because of my lack of patience and inability to leave a good formula alone. This time, I'm not changing anything, I'm gonna' be a good little grower and not try to outsmart my plants, I'll just listen to them. Peace.